We have moved my mother out of assisted living to living with my sister, just a block from me. In assisted living she was awakened at 7:00 am everyday. When she moved she started waking up later and later. I think sleeping till 10:00 is acceptable, but my sister lets her stay in bed till 12:00.... which I think is wrong on a continual basis. Mom is very agreeable to whatever we do.
A facility has MANY concerns, so scheduled time would be very important to maintain each need of all residents.
It is easy to let them sleep while you get things done around the house, but you are creating a 24 hour active caretaking job.
If she goes to bed at 8 pm and stays in bed until noon 15 or 16 hours in bed without being changed is a long time. Unless mom is being changed during the night.
My Husband was pretty much on a schedule in bed by 7 (that was his doing at the start.) and I would get him up around 7 am and into the shower. He would sleep during the day in his recliner early on then in his wheelchair. But we would waken him for lunch and dinner and to change his briefs. (pull up then later tab briefs) All total he would sleep on average 12 hours a day and that progressed to sleeping about 20 to 22 hours a day as he declined.
A schedule is good for the caregiver for several reasons, the caregiver can get tasks done, plan when a visit from a friend might be possible.
"They tend to get less deep or 'slow-wave' sleep, which helps to keep the brain healthy and refreshed. Even though a person with dementia may end up sleeping more than a typical person of their age – even as much as 14–15 hours a day – it is unlikely to all be good quality sleep.Mar 21, 2019"
Here is an article
https://www.sleepfoundation.org/articles/alzheimers-disease-and-sleep
medication schedule
continence/toileting
sleeping later in the day leading to being awake more at night
too much time in bed leading to decreased muscle tone - use it or lose it
I’ve read that the “Magic Window” for length of sleep for age 75 and above, is 7-9 hours. Less than 7 hours or more than 9, is considered not as healthy.
Happy Dreams to her!
Sure, routine is important, but remaining flexible, is more important.